摘要
为解决把空间数据系统咨询委员会(CCSDS)推荐的Turbo码直接用于深空通信基于小波变换的图像压缩数据纠错效率低的问题,提出了一种适合于其传输的混合ARQ方案。它是根据图像小波变换后数据重要性不同的特点,利用CCSDS推荐的用于深空通信的Turbo码本身的纠错性能,并充分结合了不同混合ARQ方案的优点提出的。通过与不同混合ARQ方案的FER和系统吞吐量的性能仿真结果比较分析表明,该方法由于充分考虑了深空通信本身的特点,因而在满足数据容错性要求的同时,提高了传输效率。
Turbo codes recommended by the Consultative Committee for Space Data Systems （CCS- DS） can correct errors in transmitting information in deep space communication. This paper proposes a hybrid ARQ method for improving efficiency of Turbo codes recommended by CCSDS correcting error of transmitting image compression data, These data are from discrete wavelet transform（DWT） of image. The way has virtue of different hybrid ARQ and effectively makes use of recommended Turbo codes by CCSDS based on different importance of data by DWT. The simulations on FER and the throughput of hybrid ARQ shows that the way not only meets the demand of correcting errors but also improves efficiency because of the characteristics of deep space communication.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2006年第6期733-738,共6页
Journal of Nanjing University of Science and Technology
关键词
自动重发请求
深空通信
图像压缩
吞吐量
hybrid ARQ
deep space communication
image compression
throughputs
